CN104701624A - Novel compact dual-band MIMO antenna - Google Patents
Novel compact dual-band MIMO antenna Download PDFInfo
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- CN104701624A CN104701624A CN201510094659.2A CN201510094659A CN104701624A CN 104701624 A CN104701624 A CN 104701624A CN 201510094659 A CN201510094659 A CN 201510094659A CN 104701624 A CN104701624 A CN 104701624A
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Abstract
The invention relates to a novel compact dual-band MIMO antenna. The novel compact dual-band MIMO antenna comprises a dielectric substrate, two antenna units and two split-ring resonators; each antenna unit comprises two antenna array subunits arranged at the upper layer of the dielectric substrate, and two grounding surfaces arranged at the lower layer of the dielectric substrate; the two antenna array subunits have the same structure and are orthogonally positioned; the two grounding surfaces are arranged at the lower layer of the dielectric substrate and respectively corresponding to the two antenna array subunits; the centers of circles of the two split-ring resonators are at the same position; the split-ring resonator with small radius is sleeved with the split-ring resonator with large radius; the two split-ring resonators are arranged at the upper layer of the dielectric substrate and positioned below the right part between the two antenna array subunits. The novel compact dual-band MIMO antenna works in two working bands, and the isolation degree of the two antenna array subunits can be obviously increased; in addition, the novel compact dual-band MIMO antenna is simple in structure, easy to be processed and manufactured, and good in application prospect.
Description
Technical field
The present invention relates to mimo antenna technical field, belong to microwave technical field, is exactly a kind of antenna adopting two concentric opening resonance loop structures to carry out reducing the degree of coupling between antenna element specifically.
Background technology
Along with the development of mobile communication technology, MIMO technology obtains the very big concern of people as the important means improving data transmission rate, MIMO technology is utilized to improve channel capacity, also can improve the reliability of channel simultaneously, reduce the error rate, MIMO technology is considered to one of alternative key technology of a new generation's communication (4G) technology simultaneously, and mimo antenna is as the important component part of mimo system, its performance directly affects the performance of mimo system.Current mimo antenna technology is faced with many important difficult problems, such as the problem such as antenna-coupled, polarization isolation.For the coupling reduced between antenna, improve the main contents that isolation is researching antenna system.For solving the problem of this respect, the structure of the isolation between a large amount of raising antenna starts to occur.
Summary of the invention
The object of this invention is to provide the two-band mimo antenna of a kind of compact conformation, high-isolation, not only can be operated in 2.45, on the WLAN working frequency range of 5.25GHz, and isolation between antenna element unit is also very high.
The technical scheme realizing the object of the invention is:
A two-band mimo antenna for Novel compact type, comprises medium substrate, two antenna elements and two split ring resonators; Described antenna element comprises an antenna element unit being arranged on medium substrate upper strata and is arranged on the medium substrate lower floor ground plane corresponding with it, described antenna element unit has two, identical and the orthogonal placement of structure, two ground planes are arranged on medium substrate lower floor, place with two antenna element unit are corresponding respectively; Two described split ring resonator centers of circle are in same position, and the split ring resonator that radius is little is nested in inside large split ring resonator, and two split ring resonators are arranged on medium substrate upper strata, the lower right between two antenna element unit.
Preferably, described antenna element is Dual-band monopole antenna, antenna is similar to double-T shaped, the length of each branch is about quarter-wave, for realizing two working frequency range, the little split ring resonator opening direction of described radius upward, the large split ring resonator opening direction of radius down, for reducing the degree of coupling between antenna element.
Preferably, described antenna element unit is specially " doing " font structure, the vertical line " done " in the middle part of font is connected and composed by thick thin two rectangles, thick rectangle upper thin rectangle under, the horizontal line at the top and middle part of " doing " font is respectively made up of two rectangles, the rectangle at middle part is provided with two notch geometries, two notch geometries are all close to the thick rectangle at middle part, the described base of the thin rectangle in antenna element unit bottom and the border overlay of medium substrate, antenna element unit is located in the middle part of the ground plane of the rectangle corresponding with it, the base of ground plane also with the border overlay of medium substrate.
Preferably, in the middle part of described antenna element unit, 1/2nd of the thick height L1 of rectangle and the wide L2 sum of its top rectangular are about 1/4th of wavelength when this Novel compact type double frequency mimo antenna is operated in 2.45GHz frequency; / 2nd of a distance L3 and middle part rectangle base jaggy L4 sum in the middle part of described antenna element unit in the middle part of rectangle base jaggy to antenna element unit between thick rectangular base is about 1/4th of wavelength when this Novel compact type double frequency mimo antenna is operated in 5.25GHz frequency.
Preferably, two described split ring resonator A/Fs are 1mm, and ring width is 0.5mm, and the distance on the center of circle and border, medium substrate base and border, the right is respectively 20mm and 30mm, described medium substrate is rectangle, and dielectric constant is 4.4, and thickness is 1mm, and long L is 70mm, and wide W is 60mm, in the middle part of described antenna element unit, the height L1 of thick rectangle is 25mm, wide W2 is 3mm, the length of thin rectangle and the wide equal of ground plane, the wide W1 of thin rectangle is 1.9mm, the long L2 of antenna element unit top rectangular is 7mm, wide W3 is 2mm, equal to the distance of breach with the broadside of middle part rectangle jaggy, distance L3 in the middle part of described antenna element unit in the middle part of rectangle base jaggy to antenna element unit between thick rectangular base extended line is 9mm, middle part rectangle base L4 jaggy is 10mm, wide L5 is 3mm, described ground plane is rectangle, its long Lg is 30mm, wide Wg is 10mm, the split ring resonator radius R 1 that described radius is little is 6.3mm, the split ring resonator radius R 2 that radius is large is 2.8mm, the broadside of the ground plane that long limit is overlapping with medium substrate base is 5mm to the distance H1 of medium substrate left boundary, on the right of long limit and medium substrate, the broadside of the ground plane of border overlay is 19mm to the distance H2 on medium substrate base.
Compared with prior art, its outstanding feature is in the present invention: (1) superior performance, and two-band can reduce the coupling of antenna; (2) structure is simple, is easy to processing and fabricating, small in volume, is convenient to large-scale production.
Accompanying drawing explanation
Fig. 1 is the two-dimensional structure schematic diagram of compact two-band mimo antenna of the present invention;
Fig. 2 is the S parameter figure of compact two-band mimo antenna of the present invention;
Fig. 3 is the directional diagram of compact two-band mimo antenna of the present invention at two center frequency point places;
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing to technical scheme of the present invention:
Embodiment one
Contrast accompanying drawing 1, its structure is: antenna is produced on medium substrate, comprises medium substrate, two antenna element unit, two split ring resonators, ground planes; Wherein said antenna element unit is positioned at the upper strata of medium substrate, and ground plane, in the lower floor of medium substrate, correspondingly with antenna element unit to be placed, and forms the antenna element that can realize two-band; Two orthogonal placements of antenna element, and close proximity between the two, both positions are relatively-stationary, and antenna element From Left circle on the left side is H1, the antenna element cell distance lower boundary H2 on the right; Two split ring resonator A/Fs are 1mm, and ring width is 0.5mm, and the center of circle of two split rings is in same position, and the split ring that radius is little is nested in inside large split ring, and down, little opening direction upward for the opening direction of large ring; Split ring is placed on the lower right between antenna element, is respectively 20mm and 30mm with the distance on medium substrate bottom boundaries and border, the right;
Contrast accompanying drawing 1, the size of the various piece of two-band mimo antenna of the present invention, L=70mm, W=60mm, L1=25mm, L2=7mm, L3=9mm, L4=10mm, L5=3mm, Lg=30mm, Wg=10mm, W1=1.9mm, W2=3mm, W3=2mm, R1=6.3mm, R2=2.8mm, H1=5mm, H2=19mm.
Contrast accompanying drawing 2, figure 2 shows medium substrate according to relative dielectric constant 4.4, thickness be 1 millimeter design time, the S parameter of the antenna utilizing HFSS software to calculate.Visible according to Fig. 2, antenna has two working frequency range, respectively at 2.40-2.48GHz and 5.15-5.35GHz, meets the working frequency range of WLAN; Transmission coefficient corresponding to the center frequency point of working frequency range is very little, and the transmission coefficient corresponding to 2.45GHz is less than-26dB, and the transmission coefficient corresponding to 5.25GHz is less than-50dB, meets the requirement of mimo system to isolation between antennas.
Contrast accompanying drawing 3, fig. 3 gives the antenna pattern of antenna at 2.45GHz and 5.25GHz place, the radiation pattern as can be seen from the figure on this two frequency bins all has omnidirectional radiation characteristic.
Compact double frequency mimo antenna of the present invention can be operated in 2.40-2.48GHz and 5.15-5.35GHz two working frequency range, and the isolation between two antenna element unit is significantly improved, and structure is simple, be easy to processing and fabricating, therefore the present invention has wide practical use.
Claims (5)
1. a two-band mimo antenna for Novel compact type, is characterized in that, comprises medium substrate, two antenna elements and two split ring resonators; Described antenna element comprises an antenna element unit being arranged on medium substrate upper strata and is arranged on the medium substrate lower floor ground plane corresponding with it, described antenna element unit has two, identical and the orthogonal placement of structure, two ground planes are arranged on medium substrate lower floor, place with two antenna element unit are corresponding respectively; Two described split ring resonator centers of circle are in same position, and the split ring resonator that radius is little is nested in inside large split ring resonator, and two split ring resonators are arranged on medium substrate upper strata, the lower right between two antenna element unit.
2. the two-band mimo antenna of a kind of Novel compact type according to claim 1, it is characterized in that, described antenna element is Dual-band monopole antenna, for realizing two working frequency range, upward, the large split ring resonator opening direction of radius down for the little split ring resonator opening direction of described radius.
3. the two-band mimo antenna of a kind of Novel compact type according to claim 2, it is characterized in that, described antenna element unit is " doing " font structure, the vertical line " done " in the middle part of font is connected and composed by thick thin two rectangles, thick rectangle upper thin rectangle under, the horizontal line at the top and middle part of " doing " font is respectively made up of two rectangles, the rectangle at middle part is provided with two notch geometries, two notch geometries are all close to the thick rectangle at middle part, the described base of the thin rectangle in antenna element unit bottom and the border overlay of medium substrate, antenna element unit is located in the middle part of the ground plane of the rectangle corresponding with it, the base of ground plane also with the border overlay of medium substrate.
4. the two-band mimo antenna of a kind of Novel compact type according to claim 3, it is characterized in that, in the middle part of described antenna element unit 1/2nd of the thick height L1 of rectangle and the wide L2 sum of its top rectangular be this Novel compact type double frequency mimo antenna when being operated in 2.45GHz frequency wavelength 1/4th; / 2nd of a distance L3 and middle part rectangle base jaggy L4 sum in the middle part of described antenna element unit in the middle part of rectangle base jaggy to antenna element unit between thick rectangular base be this Novel compact type double frequency mimo antenna when being operated in 5.25GHz frequency wavelength 1/4th.
5. the two-band mimo antenna of a kind of Novel compact type according to claim 4, it is characterized in that, two described split ring resonator A/Fs are 1mm, and ring width is 0.5mm, and the distance on the center of circle and border, medium substrate base and border, the right is respectively 20mm and 30mm, described medium substrate is rectangle, and dielectric constant is 4.4, and thickness is 1mm, and long L is 70mm, and wide W is 60mm, in the middle part of described antenna element unit, the height L1 of thick rectangle is 25mm, wide W2 is 3mm, the length of thin rectangle and the wide equal of ground plane, the wide W1 of thin rectangle is 1.9mm, the long L2 of antenna element unit top rectangular is 7mm, wide W3 is 2mm, equal to the distance of breach with the broadside of middle part rectangle jaggy, distance L3 in the middle part of described antenna element unit in the middle part of rectangle base jaggy to antenna element unit between thick rectangular base extended line is 9mm, middle part rectangle base L4 jaggy is 10mm, wide L5 is 3mm, described ground plane is rectangle, its long Lg is 30mm, wide Wg is 10mm, the split ring resonator radius R 1 that described radius is little is 6.3mm, the split ring resonator radius R 2 that radius is large is 2.8mm, the broadside of the ground plane that long limit is overlapping with medium substrate base is 5mm to the distance H1 of medium substrate left boundary, on the right of long limit and medium substrate, the broadside of the ground plane of border overlay is 19mm to the distance H2 on medium substrate base.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993233A (en) * | 2015-07-17 | 2015-10-21 | 中国科学院上海高等研究院 | A high-isolation micro-strip patch MIMO antenna having the characteristic of radiation mode diversity |
| CN105762513A (en) * | 2016-03-03 | 2016-07-13 | 福建省汇创新高电子科技有限公司 | Small-size high-isolation double-frequency MIMO antenna for WLAN (Wireless Local Area Network) |
| CN110085970A (en) * | 2018-08-10 | 2019-08-02 | 深圳捷豹电波科技有限公司 | A kind of antenna and terminal device |
| CN110098485A (en) * | 2019-05-06 | 2019-08-06 | 深圳锐越微技术有限公司 | Small spacing micro-strip antenna array |
| CN110911839A (en) * | 2019-12-13 | 2020-03-24 | 北京邮电大学 | 5G dual-band high-isolation dual-port common-ground monopole antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104993233A (en) * | 2015-07-17 | 2015-10-21 | 中国科学院上海高等研究院 | A high-isolation micro-strip patch MIMO antenna having the characteristic of radiation mode diversity |
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| CN105762513A (en) * | 2016-03-03 | 2016-07-13 | 福建省汇创新高电子科技有限公司 | Small-size high-isolation double-frequency MIMO antenna for WLAN (Wireless Local Area Network) |
| CN105762513B (en) * | 2016-03-03 | 2019-04-12 | 福建省汇创新高电子科技有限公司 | A kind of miniaturization high-isolation double frequency mimo antenna applied to WLAN |
| CN110085970A (en) * | 2018-08-10 | 2019-08-02 | 深圳捷豹电波科技有限公司 | A kind of antenna and terminal device |
| CN110098485A (en) * | 2019-05-06 | 2019-08-06 | 深圳锐越微技术有限公司 | Small spacing micro-strip antenna array |
| CN110911839A (en) * | 2019-12-13 | 2020-03-24 | 北京邮电大学 | 5G dual-band high-isolation dual-port common-ground monopole antenna |
| CN110911839B (en) * | 2019-12-13 | 2020-11-03 | 北京邮电大学 | 5G dual-band high-isolation dual-port common-ground monopole antenna |
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Effective date of registration: 20181212 Address after: 226000 Room 8319, Building 11, Happy New Town, Gangzha District, Nantong City, Jiangsu Province Patentee after: Nanjing University of Posts and Telecommunications Nantong Institute Limited Address before: 210003 new model road 66, Gulou District, Nanjing, Jiangsu Patentee before: Nanjing Post & Telecommunication Univ. |
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